Internal mandrel for use in bending the ends of pipes

Details Internal mandrel for use in bending the ends of pipes Internal mandrel for use in bending the ends of pipes

1975-11-14

1977-06-07

Spruill, Robert Louis

Metal deforming

Tool and/or tool holder

Including flexible or yieldable tool or support

72392, 269 481, B21B 2500, B21D 900

Patent

active

040275221

ABSTRACT:
Internal mandrel for use in bending the ends of pipes, wherein a hydraulic cylinder actuates a system of levers and toggles to apply force across the interior of an end of a pipe in the direction in which the pipe is to be bent to prevent distortion and collapse of the pipe during bending adjacent to its ends.

REFERENCES:
patent: 2156651 (1939-05-01), Gardiner
patent: 2823634 (1958-02-01), Barth
patent: 3043361 (1962-07-01), Kelso
patent: 3109477 (1963-11-01), Avera et al.

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